Hair dryer



FIG. 1 is a front elevational view of a hair dryer showing the new design thereof;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom right front perspective view thereof; and,

FIG. 7 is a bottom left front perspective view thereof. 

The ornamental design for a hair dryer, as shown and described. 